Two-dimensional Cartesian air-gap element (CAGE) for dynamic finite-element modeling of electrical machines with a flat air gap

• Published in: IEEE transactions on magnetics Vol. 38; no. 2; pp. 1357 - 1360
• Main Authors: Wang, R., Mohellebi, H., Flack, T.J., Kamper, M.J., Buys, J.D., Feliachi, M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-03-2002; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Africa; Age; Air gaps; Applied sciences; Cage; Electric motors; Electric potential; Electrical engineering. Electrical power engineering; Electrical machines; Exact sciences and technology; Finite element method; Finite element methods; Force measurement; Iron; Magnetic field measurement; Magnetism; Mathematical analysis; Mathematical models; Mesh generation; Permanent magnet motors; Rotating machines; Two dimensional; Electrical engineering; Finite element method; Air gap; Theoretical study; Magnetos; Numerical simulation; Linear motor; Electric motor; Magnetic field; Mesh generation
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/20.996024

This paper extends the air-gap element (AGE) to enable the modeling of flat air gaps. AGE is a macroelement originally proposed by Abdel-Razek et al. (IEEE Trans. Magn., vol. 17, pp. 3250-3252, 1981; ibid., vol. 18, pp. 655-659, 1982) for modeling annular air gaps in electrical machines. The paper presents the theory of the new macroelement and explains its implementation within a time-stepped finite-element (FE) code. It validates the solution produced by the new macroelement by comparing it with that obtained by using an FE mesh with a discretized air gap. It then applies the model to determine the open-circuit electromotive force of an axial-flux permanent-magnet machine and compares the results with measurements.